Microbubble based fiber-optic Fabry–Perot interferometer formed by fusion splicing single-mode fibers for strain measurement

2012 ◽  
Vol 51 (8) ◽  
pp. 1033 ◽  
Author(s):  
De-Wen Duan ◽  
Yun-jiang Rao ◽  
Yu-Song Hou ◽  
Tao Zhu
Keyword(s):  
Strain Measurement ◽  
Fiber Optic ◽  
Single Mode ◽  
Fabry Perot

scholarly journals Preparation and Characterization of Microsphere ZnO ALD Coating Dedicated for the Fiber-Optic Refractive Index Sensor

Nanomaterials ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 306 ◽  
Author(s):  
Paulina Listewnik ◽  
Marzena Hirsch ◽  
Przemysław Struk ◽  
Matthieu Weber ◽  
Mikhael Bechelany ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Fiber Optic ◽  
Single Mode ◽  
Atomic Layer ◽  
Fiber Optic Sensor ◽  
Refractive Index Sensor ◽  
Layer Deposition ◽  
Fabry Perot

We report the fabrication of a novel fiber-optic sensor device, based on the use of a microsphere conformally coated with a thin layer of zinc oxide (ZnO) by atomic layer deposition (ALD), and its use as a refractive index sensor. The microsphere was prepared on the tip of a single-mode optical fiber, on which a conformal ZnO thin film of 200 nm was deposited using an ALD process based on diethyl zinc (DEZ) and water at 100 °C. The modified fiber-optic microsphere was examined using scanning electron microscopy and Raman spectroscopy. Theoretical modeling has been carried out to assess the structure performance, and the performed experimental measurements carried out confirmed the enhanced sensing abilities when the microsphere was coated with a ZnO layer. The fabricated refractive index sensor was operating in a reflective mode of a Fabry–Pérot configuration, using a low coherent measurement system. The application of the ALD ZnO coating enabled for a better measurement of the refractive index of samples in the range of the refractive index allowed by the optical fiber. The proof-of-concept results presented in this work open prospects for the sensing community and will promote the use of fiber-optic sensing technologies.

Single-mode fiber-optic Fabry–Perot interferometry sensor based on optical cross-correlation demodulation

2019 ◽  
Vol 58 (02) ◽  
pp. 1
Author(s):  
Ke Chen ◽  
Zelin Wang ◽  
Min Guo ◽  
Bowen Liu ◽  
Qingxu Yu
Keyword(s):  
Cross Correlation ◽  
Fiber Optic ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Fabry Perot

scholarly journals Based on FP LDs with split band technique in two-channel fiber optical CATV transport system

2018 ◽  
Vol 185 ◽  
pp. 00015
Author(s):  
Wen-Shing Tsai ◽  
Hong-Yu Dai ◽  
Chung-Yi Li
Keyword(s):  
Transport System ◽  
Fiber Optic ◽  
Single Mode ◽  
Cost Effective ◽  
Single Mode Fiber ◽  
Transport Systems ◽  
Transmission Scheme ◽  
Fabry Perot ◽  
Fiber Optical ◽  
Split Band

This study proposes a two-channel fiber optic cable television (CATV) transport system based on Fabry–Perot laser diodes (FP-LDs) with a split band technique. To reduce the interference between channels, we apply the split band technique to two channels with different frequencies by using two converters at each moment. In this two-channel transmission scheme, composite second-order (CSO) and composite triple-beat (CTB) distortions induced by the systems are possibly confined in unused channels and result in good transmission performances. Through a 40 km standard single-mode fiber transmission, excellent performances of carrier-to-noise ratio (≥50 dB), CSO (≥70 dB), and CTB (≥72 dB) are obtained using the proposed fiber optic CATV transport systems. The proposed systems employing FP-LDs with a split band technique are also simpler and more cost effective than conventional externally modulated systems.

scholarly journals Miniature All-Silica Microbubble-Based Fiber Optic Fabry-Perot Pressure Sensor with Pressure Leading-In Tube

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Huixin Zhang ◽  
Jia Liu ◽  
Jiashun Li ◽  
Pinggang Jia ◽  
Fei Feng ◽  
...  
Keyword(s):  
Low Temperature ◽  
Temperature Coefficient ◽  
Pressure Sensor ◽  
Room Temperature ◽  
Fiber Optic ◽  
Single Mode ◽  
External Pressure ◽  
Compact Structure ◽  
Fabry Perot ◽  
Length Changes

A novel all-silica fiber optic Fabry-Perot (FP) pressure sensor with pressure leading-in tube based on microbubble structure is developed and experimentally demonstrated. The FP cavity is formed by fixing the end face of the single-mode fiber (SMF) parallel to the outer surface of the microbubble, in which the microbubble with a diameter of about 318 μm is constructed at the end of silica hollow tube. When external pressure is transmitted on the inner surface of the microbubble by the pressure leading-in tube, the FP cavity length changes with the diameter of microbubble. Experimental results show that such a sensor has a linear sensitivity of approximately 4.84 nm/MPa at room temperature over the pressure range of 1.1 MPa; the sensor has a very low temperature coefficient of approximately 2 pm/°C from room temperature to 600°C. The sensor has advantages of extremely low temperature coefficient, compact structure, and small size, which has potential applications for measuring pressure in high-temperature environment.

scholarly journals Development of a fiber optic torque sensor and a single channel, high precision optical strain measurement platform

2021 ◽  
Author(s):  
Nicholas Burgwin
Keyword(s):  
Strain Measurement ◽  
Fiber Optic ◽  
Single Channel ◽  
Optical Measurement ◽  
Spectral Width ◽  
Fiber Optic Sensor ◽  
Torque Sensor ◽  
Interference Immunity ◽  
Fabry Perot ◽  
Optical Strain

Fiber optic sensors based on Fiber Bragg Grating (FBG) technology have been successfully adopted for sensor measurements for almost two decades. The advantages offered by FBG sensors, such as Electro-Magnetic Interference immunity and inherent intrinsic safety, provide motivation for the development of a commercial measurement platform. With the development of an FBG Fabry-Perot cavity, a sensor with sub-picometer spectral width allows for a factor of 1000 times improvement in strain measurement. This thesis presents the development of a highly-accurate optical measurement platform based on the FBG Fabry-Perot cavity and Pound-Drever-Hall (PDH) laser locking technique that is demonstrated through the development of an optical torque sensor. With the fiber optic sensor designed as per the PDH requirements, the platform achieved a measurement accuracy of +/-0.015% of the full-scale torque value of 188N∙m. With the platform at ~$2,000, a successful demonstration of the platform and a fiber optic torque sensor is presented.

scholarly journals A Composite Fabry-Perot Interferometric Sensor with the Dual-Cavity Structure for Simultaneous Measurement of High Temperature and Strain

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 4989
Author(s):  
Ping Xia ◽  
Yuegang Tan ◽  
Caixia Yang ◽  
Zude Zhou ◽  
Kang Yun
Keyword(s):  
High Temperature ◽  
Simultaneous Measurement ◽  
Strain Measurement ◽  
Fiber Composite ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Compact Structure ◽  
Cavity Structure ◽  
Fabry Perot ◽  
Interferometric Sensor

In this paper, an optical fiber composite Fabry-Perot interferometric (CFPI) sensor capable of simultaneous measurement of high temperature and strain is presented. The CFPI sensor consists of a silica-cavity intrinsic Fabry–Perot interferometer (IFPI) cascading an air-cavity extrinsic Fabry–Perot interferometer (EFPI). The IFPI is constructed at the end of the transmission single-mode fiber (SMF) by splicing a short piece of photonic crystal fiber (PCF) to SMF and then the IFPI is inserted into a quartz capillary with a reflective surface to form a single-ended sliding EFPI. In such a configuration, the IFPI is only sensitive to temperature and the EFPI is sensitive to strain, which allows the achieving of temperature-compensated strain measurement. The experimental results show that the proposed sensor has good high-temperature resistance up to 1000 °C. Strain measurement under high temperatures is demonstrated for high-temperature suitability and stable strain response. Featuring intrinsic safety, compact structure and small size, the proposed CFPI sensor may find important applications in the high-temperature harsh environment.

scholarly journals An In-Line Fiber Optic Fabry–Perot Sensor for High-Temperature Vibration Measurement

Micromachines ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 252
Author(s):  
Dong Chen ◽  
Jiang Qian ◽  
Jia Liu ◽  
Baojie Chen ◽  
Guowen An ◽  
...  
Keyword(s):  
High Temperature ◽  
Fiber Optic ◽  
Glass Tube ◽  
Single Mode ◽  
Vibration Sensor ◽  
Vibration Measurement ◽  
Voltage Sensitivity ◽  
Hollow Silica ◽  
Fabry Perot ◽  
Radial Dimension

An in-line fiber optic Fabry–Perot (FP) sensor for high-temperature vibration measurement is proposed and experimentally demonstrated in this paper. We constructed an FP cavity and a mass on single-mode fibers (SMFs) by fusion, and together they were inserted into a hollow silica glass tube (HST) to form a vibration sensor. The radial dimension of the sensor was less than 500 μm. With its all-silica structure, the sensor has the prospect of measuring vibration in high-temperature environments. In our test, the sensor had a resonance frequency of 165 Hz. The voltage sensitivity of the sensor system was about 11.57 mV/g and the nonlinearity was about 2.06%. The sensor could work normally when the temperature was below 500 °C, and the drift of the phase offset point with temperature was 0.84 pm/°C.

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